Answer: Does not change density of the crystal.
- A Reduces density of the crystal
- B Does not change density of the crystal
- C Increases density of the crystal
- D Produces free electrons in the crystal
Correct answer: B. Does not change density of the crystal
Explanation: In a Frenkel defect, an ion moves from a lattice site to an interstitial site; no particles are removed, so density is unchanged.
The three cubic unit cells: Simple Cubic has atoms only at corners; Body-Centred adds one atom at the centre; Face-Centred adds one atom at the centre of each of the 6 faces, giving the highest packing efficiency.
Concept context
Explore the ordered world of crystalline solids: unit cells, packing, defects, and how structure determines electrical and magnetic properties.